Adjusting appliance for type-writing machines.



C. S. ALVERSON. ADJUSTING APPLIANCE FOR TYPE WRITING MACHIN APPLICATIONFILED DEC. 2, 1907.

9 11,2 94;. Patented Nov. 23, 1909;

WITNESSES .JN'VENTOR CAREY s. ALVER$0N.

ATTORNEY tile TATJEN @FFEQE.

cA zlY S. ALVERSON, OF SAIT DIEGO, CALIFORNIA.

ADJUSTING APPLIANCE FOR TYPE-V I'EITING. MACHINES.

To all whom it may concern.

Be it known that I, Canny S. Anvnnsox, a citizen of the United States,residing at San Diego, in the county of San Diego and State ofCalifornia have invented a new and useful Adjustable rlttachment forType- W'riting Machines, of which the following is a specification.

My invention relates to improvements in a platen for a typewriter towhich the paper is applied for the purpose-of writing. The platen isprovided with adjustable worm and gear shifting attachments for thepurpose of systematically adjusting the paper for replacing a figure orletter after the paper has been removed from the typewriting machine andreturned again. With this adjustable platen appliance, and attachments,the user may quickly return a paper to the machine and adjust it to theproper position for replacing one or more letters as the occasion mayrequire, and by the aid of the indicator, which is part of theadjustable appliance, it is possible to very accurately and quickly movethe platen into position which is shown by the indicator needle orpointer when it is in perfect line horizontally or in a perfect positionvertically-"for re-inserting any figure or letter that it may be desiredto replace therein. I attain these objects by the mechanism illus tratedin the accompanying drawings, in which Figure l is a broken frontelevation of parts of a typewriting machine showing my attachmentsthereto. Fig. l is a sectional View of the paper finger or pointer. Fig2 is a top plan view of the parts shown in Fig. 1. Fig. 3 is a. detailview of the arm for adjusting the platen longitudinally, and Fig. 4 .isa detailed sectional view on the line cvae of Fig. 1.

Similar letters refer to similar parts throughout the several views.

A is a platen to which the adjustable improvements are attached.

B is the shaft which is inserted through the center of the platen A andhas on eitherend a wheel C which is used for turning the platen back andforth when desired to be moved rapidly.

The lever .D and wheel E are elements of the line spacing appliance suchas is now employed on tvnewriters but which does not constitute part ofmy invention.

F indicates parts of'the frame of the car- Patented Nov. 23, 1909.Serial No. 404,654.

The part of the frame or bracket F isprovided with a slot R runningtransversely to the platen shaft. extends through said slot and carriesa worm H on its lower end adapted to mesh with a gear J on the platenshaft. Said auxiliary shaft is also provided with a.button N on itsupper end, a fixed collar L arranged below the slot R and a movablecollar L arranged above said slot and pressed by a spring M abutting atits opposite ends against said movable collar and the button N. Lugs Rare formed on the upper surface of the bracket F, midway of the slot R,for the purpose of holding the shaft K in one end of the slot or theother. The position of this slot may be changed by raising the springpressed collar L. It will be noted that when the auxiliary shaft isarranged in the right hand end of the slot, as shown in Fig. 4, the wormH will lo'ev out of mesh with the gear J thereby allowing the platenshaft to revolve freely during the operation of the typewriter. It willalso be noted that the moving of the auxiliary shaft to the lefthand endof the slot will bring the worm H into mesh with the gear J permittingthe platen shaft to be revolved by turning the button on the end of theauxiliary shaft for the purpose of fractional line spacing.

O designates two keys whereby the platen A is splined on the shaft Bandsaid platen is ada ted to slide longitudinally on said shaft 'reely andwithout binding.

An arm P is provided with a forked end P and is mounted on thescrew-threaded portion 1?. of the shaft Q as shown at U in Fig. 2. Saidforked end P engages a groove in the collar or sleeve A on the platen.

S is a. button or moves the platen A longitudinally to a properadjustment.

T is a collar on the end of shaft Q which holds it in position. Y

V is an indicator or pointer which indicates the proper position of thepaper for re-insertin the letter,'that works in conjunction with theadjustable appliance.

W' is a casing which holds a spring Z in to turn shaft Q, which slides-An auxiliary. shaft K connection with. indicator V. Said'spring engagesa groove Y on the shaft X.

I am aware that prior to my invention some of the diflerent parts of thetypewriting-machine shown here in the drawings .which form a part of thespecification to my improvements have been patented, and therefore, donot claim those parts to be new and patentable, but simply show them asparts of the typewriting machine to which my improvements are attachedall of which are intended to work in conjunction with each other for thepurpose of accomplishing the objects set forth in the specifications.

I claim:

1. In a typewriter, the combination, with the carriage, of the platencarrying shaft,

the platen splined on said shaft, another shaft arranged parallel to theplaten and having a screw threaded portion, an arm mounted on said screwthreaded portion of said shaft and having its end forked and engaging agroove in a sleeve on said platen,

and means to rotate said second shaft for the purpose of moving saidplaten longi tudinally 'on said carriage.

' 2. In a typewriter, the combination, with the carriage, of the platencarrying shaft, the platen splined on said shaft, another shaft arrangedparallel to-the platen and having a screw threaded portion, an armmounted on said screw threaded portion of said shaft and having its endforked and engaging a groove in a sleeve on said platen, means to rotatesaid second shaft. for the purpose of moving said platen longitudinallyon said carriage, and means to revolve said platen for the purpose offractional line spacing.

CAREY s. ALVERSON.

Witnesses:

J. WV. WASHE, N. M. Gooowm

